Mobile mixer



FIG. 1 is a side elevational view of a mobile mixer, the opposite side being a mirror image therof, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a side elevational view thereof in an alternate position. 

The ornamental design for a mobile mixer, as shown. 